General
The rail-type multifunction electrical instrument with external Rogowski coil and split-core current transformer is applicable for the energy-saving reconstruction project in high energy consumption industries including the smelting, iron and steel, welding and semi-conductor industry. It is also suitable for applications such as the power monitoring of grid-connected cabinet for distributed photovoltaic power cabinet and energy demand management. It boasts of no need of bus removal, easy connection and safe construction, saving reconstruction cost and raising efficiency for the user. It integrates the measurements of all electric parameters (including single-phase or three-phase current, voltage, active power, reactive power, apparent power, frequency and power factor£©and comprehensive energy monitoring and examination management. Meanwhile, it also has various peripheral interfaces for the user to choose: the RS485 communication interface with MODBUS-RTU protocol can meet the need of online communication management; the interfaces with switch input and relay output can realize the remote signalling and remote control of the circuit breaker switch. It is very suitable for real-time power monitoring system with an LCD display and the panel buttons to realize the setting and control of parameters.
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Naming Rule
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Functions
Measurement Parameters£º
current, voltage, active power,
reactive power, power factor,
active energy, reactive energy
Accuracy
Voltage: 0.2, Current, Power,Active energy: 0.5,Frequency:0.01Hz,Reactive energy:1
Frequency: 45¢¦65Hz
Power consumption: ¡Â10VAp>
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Power supply output:
AC85¢¦265V or DC100¢¦350V
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Input consumption
Less than 0.2VA
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Dimension(L*W*H)
85*74*54mm
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Installation
Din rail 35mm
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Technical Parameters
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Dimension
Communication Connection
The instrument provides asynchronous half-duplex RS485 communication interface wich adopts MODBUS-RTU protocol so all kinds of data can be transmitted on the communication line. Theoretically, one communication line can be connected with up to 128 instruments, each of which can set a communication address (Addr) and communication rate (baud) via setting.
For the communication connection, we recommend to use the three-core shielding wire .The core wires are connected to A,B,COM2 respectively and the shielding layer is connected to the ground. COM2 is forbidden to have ground connection. When laying the wires, the communication line shall be kept away from the strong current cable or other strong electric field.
It is recommended to add a matching resistor between A and B of the end instruments. The resistance range is 120¥Ø¢¦10k¥Ø.